An anatomical feature that distinguishes us from our closest relative, the apes, is a large, highly developed brain. Why would natural selection have favored an individual with a highly developed brain?
a. It provided traits required for an advanced culture.
b. These individuals would have been much more successful at completing the tasks required to stay alive, such as hunting for food.
c. It led to an extended life span.
d. It provided eyesight with color vision and depth perception.
e. It provided characteristics not seen before, such as standing upright.
Ans: b. These individuals would have been much more successful at completing the tasks required to stay alive, such as hunting for food.
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Immunological tolerance refers to ____
a. decreased immune system response to latent viruses b. decreased immune system response to nonpathogenic bacteria c. decreased tolerance of the body for pathogens it has already encountered d. desensitization to allergens to lessen allergic responses e. protection of the body’s own molecules from attack by its immune system
The "language" of the genetic code of DNA uses an alphabet of
a. nucleotide bases. b. proteins. c. amino acids. d. sugars. e. phosphate molecules.
Use the following points to compare transpiration and translocation
1. Principle substance(s) transported 2. Direction of transport 3. Tissue through which transport occurs 4. Name of model that explains the process 5. Does the plant expend energy to carry out the process? What will be an ideal response?
From looking at the plant sunflower plant you conclude:
A) That the missing nutrient is mobile and likely Ca. B) That the missing nutrient is mobile and likely N. C) That the missing nutrient is non-mobile and likely Ca. D) That the missing nutrient is non-mobile and likely N.